package com.litianhao.nowcode.controller;

import com.litianhao.nowcode.annotation.LoginRequired;
import com.litianhao.nowcode.entity.User;
import com.litianhao.nowcode.service.FollowService;
import com.litianhao.nowcode.service.LikeService;
import com.litianhao.nowcode.service.UserService;
import com.litianhao.nowcode.util.CommunityConstant;
import com.litianhao.nowcode.util.CommunityUtil;
import com.litianhao.nowcode.util.HostHolder;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

/**
 * @author litianhao
 * @create 2020-05-21 19:59
 */
@Controller
@RequestMapping("/user")
public class UserController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(UserController.class);

    @Value("${nowcode.path.upload}")
    private String uploadPath;

    @Value("${nowcode.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private UserService userService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private LikeService likeService;

    @Autowired
    private FollowService followService;

    @LoginRequired
    @RequestMapping(path = "/setting",method = RequestMethod.GET)
    public String getSettingPage(){
        return "/site/setting";
    }

    //更新头像
    @LoginRequired
    @RequestMapping(path = "/upload",method = RequestMethod.POST)
    public String uploadHeader(MultipartFile headerImage, Model model){
        if(headerImage==null){
            model.addAttribute("error","您还没有选择图片");
            return "/site/setting";
        }
        String filename = headerImage.getOriginalFilename();
        String suffix = filename.substring(filename.lastIndexOf("."));
        if(StringUtils.isBlank(suffix)){
            model.addAttribute("error","文件的格式不正确");
            return "/site/setting";
        }
        //生成随机的文件名
        filename = CommunityUtil.generateUUID()+suffix;
        //文件存放的路径
        File dest = new File(uploadPath+"/"+filename);
        try {
            headerImage.transferTo(dest);
        } catch (IOException e) {
            logger.error("上传文件失败 "+e.getMessage());
            throw new RuntimeException("上传文件失败，服务器异常",e);
        }

        //更新当前用户的头像的路径(web访问路径)
        //http://localhost:8080/community/user/header/xxx.png
        User user = hostHolder.getUser();
        String headerUrl = domain+contextPath+"/user/header"+filename;
        userService.updateHeader(user.getId(),headerUrl);

        return "redirect:/index";

    }

    //获取头像
    @RequestMapping(path = "/header/{filename}",method = RequestMethod.GET)
    public void getHeader(@PathVariable("filename") String filename, HttpServletResponse response){
        //服务器存放的路径
        filename = uploadPath+"/"+filename;
        //文件后缀
        String suffix = filename.substring(filename.lastIndexOf("."));
        //响应图片
        response.setContentType("image/"+suffix);
        try(
                FileInputStream fis = new FileInputStream(filename);
                ServletOutputStream os = response.getOutputStream();
                ) {
            byte[] buffer = new byte[1024];
            int b = 0;
            while ((b=fis.read(buffer)) != -1){
                os.write(buffer,0,b);
            }
        } catch (IOException e) {
            logger.error("读取头像失败： "+e.getMessage());
        }
    }

    //个人主页
    @RequestMapping(path = "/profile/{userId}",method = RequestMethod.GET)
    public String getProfilePage(@PathVariable("userId") int userId,Model model){
        User user = userService.findUserById(userId);
        if(user == null){
            throw new RuntimeException("该用户不存在");
        }
        //用户
        model.addAttribute("user",user);
        //点赞数量
        int likeCount = likeService.findUserLikeCount(userId);
        model.addAttribute("likeCount",likeCount);

        //关注数量
        long followeeCount = followService.findFolloweeCount(userId, ENTITY_TYPE_USER);
        model.addAttribute("followeeCount",followeeCount);
        //粉丝数量
        long followerCount = followService.findFollowerCount(ENTITY_TYPE_USER, userId);
        model.addAttribute("followerCount",followerCount);

        //是否已关注
        boolean hasFollowed = false;
        if(hostHolder.getUser()!=null){
            hasFollowed = followService.hasFollowed(hostHolder.getUser().getId(),ENTITY_TYPE_USER,userId);

        }
        model.addAttribute("hasFollowed",hasFollowed);
        return "/site/profile";
    }


}
